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[He] 2s2 2p4There are 4 potential shells of electrons for the elements in the periodic table, denoted by the first number, 1 to 4.Within each shell there is a matching number of subshells; in shell 1 ther...

3.5 g of sodium500 cm³ of water is 0.5 dm^33.5 / 0.5 = 7 g dm^-3

This is because of the special type of bonding that occurs in metals. A metal is a giant structure of regularly arranged atoms, the outermost electrons ( check they understand the differences between the ...

First we have covalent where electrons are shared between two atoms.
then we have ionic where one one atom transfers their electron to another atom. These oppositely charge ions forms a strong electr...

1. You would use chromatography, the different colours have different affinities depending on the solvent you use. So different colours will travel longer than other on your chromatogram (support).2) Y...